Ok you have decided to collect but have little knowledge about your chosen subject, the only thing you can do is to rely on the persons selling you your chosen collectable being honest,  there are a lot of honest people out  there, but it is better for you to learn, and this is a never ending journey.  In my opinion  the best way is to:

Read as many books as you can even books in a language you cannot understand as illustrations and pictures can tell you a lot.

Visit museums and antique shops touch the items and get a feel for them.

Visit auctions and look and touch to get a feel for them

THINGS CONSIDER

Faces, fingers, flowers, factory mark:  are details consistent with the period of work that is said it comes from.

Is the decoration to much

Why should anyone fake the object

Is the glazing consistent to the time and are the colour, texture, firing faults, thickness, consistency, and tightness of body correct for the factory/country/period/ of the piece.

Are there any signs of the glaze having been tampered with.

The gilding  is the colour, mercury/honey  right for the period

Is the style consistent with the period,

Is wear and tear  e.g. scratches chipping, consistent with the age  and use of the piece,  could it be faked

Is the body , weight, colour , translucency, thickness, shape, form, method of casting, moulding, hand modelling correct.

Colours of the item did the factory use that pallet at the time and do colours have the correct density/ surface appearance., do they sit on the glaze correctly.

Good reference books:

Sotheby's Concise Encyclopaedia of porcelain General editor David Battie

Millers Understanding Antiques
Is it Genuine how to collect antiques with confidence general Editor
John Bly

Millers collectables price guide

Millers Antiques Price Guide professional hand book

Encyclopaedia of British pottery and porcelain marks by: Geoffrey A Godden,

F.R.S.A